Option to reverse chapters order

app/src/main/java/org/koitharu/kotatsu/core/exceptions/CloudFlareProtectedException.kt

@@ -8,5 +8,5 @@ class CloudFlareProtectedException(
 	val url: String
 ) : IOException("Protected by CloudFlare"), ResolvableException {
 
-	override val resolveTextId: Int = R.string.resolve
+	override val resolveTextId: Int = R.string.captcha_solve
 }

app/src/main/java/org/koitharu/kotatsu/core/prefs/AppSettings.kt

@@ -74,6 +74,8 @@ class AppSettings private constructor(private val prefs: SharedPreferences) :
 
 	var historyGrouping by BoolPreferenceDelegate(KEY_HISTORY_GROUPING, true)
 
+	var chaptersReverse by BoolPreferenceDelegate(KEY_REVERSE_CHAPTERS, false)
+
 	val zoomMode by EnumPreferenceDelegate(
 		ZoomMode::class.java,
 		KEY_ZOOM_MODE,
@@ -175,5 +177,6 @@ class AppSettings private constructor(private val prefs: SharedPreferences) :
 		const val KEY_RESTORE = "restore"
 		const val KEY_HISTORY_GROUPING = "history_grouping"
 		const val KEY_DOZE_WHITELIST = "doze_whitelist"
+		const val KEY_REVERSE_CHAPTERS = "reverse_chapters"
 	}
 }

app/src/main/java/org/koitharu/kotatsu/details/DetailsModule.kt

@@ -9,6 +9,6 @@ val detailsModule
 	get() = module {
 
 		viewModel { (intent: MangaIntent) ->
-			DetailsViewModel(intent, get(), get(), get(), get(), get())
+			DetailsViewModel(intent, get(), get(), get(), get(), get(), get())
 		}
 	}

app/src/main/java/org/koitharu/kotatsu/details/ui/ChaptersFragment.kt

@@ -33,6 +33,11 @@ class ChaptersFragment : BaseFragment<FragmentChaptersBinding>(),
 	private var actionMode: ActionMode? = null
 	private var selectionDecoration: ChaptersSelectionDecoration? = null
 
+	override fun onCreate(savedInstanceState: Bundle?) {
+		super.onCreate(savedInstanceState)
+		setHasOptionsMenu(true)
+	}
+
 	override fun onInflateView(
 		inflater: LayoutInflater,
 		container: ViewGroup?
@@ -51,6 +56,9 @@ class ChaptersFragment : BaseFragment<FragmentChaptersBinding>(),
 
 		viewModel.isLoading.observe(viewLifecycleOwner, this::onLoadingStateChanged)
 		viewModel.chapters.observe(viewLifecycleOwner, this::onChaptersChanged)
+		viewModel.isChaptersReversed.observe(viewLifecycleOwner) {
+			activity?.invalidateOptionsMenu()
+		}
 	}
 
 	override fun onDestroyView() {
@@ -59,12 +67,22 @@ class ChaptersFragment : BaseFragment<FragmentChaptersBinding>(),
 		super.onDestroyView()
 	}
 
-	private fun onChaptersChanged(list: List<ChapterListItem>) {
-		chaptersAdapter?.items = list
+	override fun onCreateOptionsMenu(menu: Menu, inflater: MenuInflater) {
+		super.onCreateOptionsMenu(menu, inflater)
+		inflater.inflate(R.menu.opt_chapters, menu)
 	}
 
-	private fun onLoadingStateChanged(isLoading: Boolean) {
-		binding.progressBar.isVisible = isLoading
+	override fun onPrepareOptionsMenu(menu: Menu) {
+		super.onPrepareOptionsMenu(menu)
+		menu.findItem(R.id.action_reversed).isChecked = viewModel.isChaptersReversed.value == true
+	}
+
+	override fun onOptionsItemSelected(item: MenuItem) = when (item.itemId) {
+		R.id.action_reversed -> {
+			viewModel.setChaptersReversed(!item.isChecked)
+			true
+		}
+		else -> super.onOptionsItemSelected(item)
 	}
 
 	override fun onItemClick(item: MangaChapter, view: View) {
@@ -159,4 +177,12 @@ class ChaptersFragment : BaseFragment<FragmentChaptersBinding>(),
 			bottom = insets.bottom
 		)
 	}
+
+	private fun onChaptersChanged(list: List<ChapterListItem>) {
+		chaptersAdapter?.items = list
+	}
+
+	private fun onLoadingStateChanged(isLoading: Boolean) {
+		binding.progressBar.isVisible = isLoading
+	}
 }

app/src/main/java/org/koitharu/kotatsu/details/ui/DetailsViewModel.kt

@@ -10,6 +10,7 @@ import org.koitharu.kotatsu.base.domain.MangaIntent
 import org.koitharu.kotatsu.base.ui.BaseViewModel
 import org.koitharu.kotatsu.core.exceptions.MangaNotFoundException
 import org.koitharu.kotatsu.core.model.Manga
+import org.koitharu.kotatsu.core.prefs.AppSettings
 import org.koitharu.kotatsu.details.ui.model.toListItem
 import org.koitharu.kotatsu.favourites.domain.FavouritesRepository
 import org.koitharu.kotatsu.history.domain.ChapterExtra
@@ -25,7 +26,8 @@ class DetailsViewModel(
 	private val favouritesRepository: FavouritesRepository,
 	private val localMangaRepository: LocalMangaRepository,
 	private val trackingRepository: TrackingRepository,
-	private val mangaDataRepository: MangaDataRepository
+	private val mangaDataRepository: MangaDataRepository,
+	private val settings: AppSettings
 ) : BaseViewModel() {
 
 	private val mangaData = MutableStateFlow<Manga?>(intent.manga)
@@ -48,6 +50,12 @@ class DetailsViewModel(
 			trackingRepository.getNewChaptersCount(mangaId)
 		}.stateIn(viewModelScope + Dispatchers.Default, SharingStarted.Eagerly, 0)
 
+	private val chaptersReversed = settings.observe()
+		.filter { it == AppSettings.KEY_REVERSE_CHAPTERS }
+		.map { settings.chaptersReverse }
+		.onStart { emit(settings.chaptersReverse) }
+		.stateIn(viewModelScope + Dispatchers.Default, SharingStarted.Eagerly, false)
+
 	val manga = mangaData.filterNotNull()
 		.asLiveData(viewModelScope.coroutineContext)
 	val favouriteCategories = favourite
@@ -56,17 +64,20 @@ class DetailsViewModel(
 		.asLiveData(viewModelScope.coroutineContext)
 	val readingHistory = history
 		.asLiveData(viewModelScope.coroutineContext)
+	val isChaptersReversed = chaptersReversed
+		.asLiveData(viewModelScope.coroutineContext)
 
 	val onMangaRemoved = SingleLiveEvent<Manga>()
 
 	val chapters = combine(
 		mangaData.map { it?.chapters.orEmpty() },
 		history.map { it?.chapterId },
-		newChapters
-	) { chapters, currentId, newCount ->
+		newChapters,
+		chaptersReversed
+	) { chapters, currentId, newCount, reversed ->
 		val currentIndex = chapters.indexOfFirst { it.id == currentId }
 		val firstNewIndex = chapters.size - newCount
-		chapters.mapIndexed { index, chapter ->
+		val res = chapters.mapIndexed { index, chapter ->
 			chapter.toListItem(
 				when {
 					index >= firstNewIndex -> ChapterExtra.NEW
@@ -76,6 +87,7 @@ class DetailsViewModel(
 				}
 			)
 		}
+		if (reversed) res.asReversed() else res
 	}.asLiveData(viewModelScope.coroutineContext + Dispatchers.Default)
 
 	init {
@@ -98,4 +110,8 @@ class DetailsViewModel(
 			onMangaRemoved.postCall(manga)
 		}
 	}
+
+	fun setChaptersReversed(newValue: Boolean) {
+		settings.chaptersReverse = newValue
+	}
 }

app/src/main/java/org/koitharu/kotatsu/list/ui/model/ListModelConversionExt.kt

@@ -1,6 +1,7 @@
 package org.koitharu.kotatsu.list.ui.model
 
 import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.core.exceptions.CloudFlareProtectedException
 import org.koitharu.kotatsu.core.exceptions.resolve.ResolvableException
 import org.koitharu.kotatsu.core.model.Manga
 import org.koitharu.kotatsu.core.prefs.ListMode
@@ -46,7 +47,7 @@ fun <C : MutableCollection<ListModel>> List<Manga>.toUi(destination: C, mode: Li
 
 fun Throwable.toErrorState(canRetry: Boolean = true) = ErrorState(
 	exception = this,
-	icon = R.drawable.ic_error_large,
+	icon = getErrorIcon(this),
 	canRetry = canRetry,
 	buttonText = (this as? ResolvableException)?.resolveTextId ?: R.string.try_again
 )
@@ -54,4 +55,9 @@ fun Throwable.toErrorState(canRetry: Boolean = true) = ErrorState(
 fun Throwable.toErrorFooter() = ErrorFooter(
 	exception = this,
 	icon = R.drawable.ic_alert_outline
-)
+)
+
+private fun getErrorIcon(error: Throwable) = when (error) {
+	is CloudFlareProtectedException -> R.drawable.ic_denied_large
+	else -> R.drawable.ic_error_large
+}